A steel rod of diameter 15 mm is held (without any initial stresses) between rigid walls by the arrangement shown in the Figure. Calculate the temperature drop AT (degrees Celsius) at which the average shear stress in the 12-mm diameter bolt becomes 45 MPa. (For the steel rod, use a=12x10/°C and E=200 GPa.) 12 mm diameter bolt 15 mm

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Buckling of columns

The column is described as a vertical member of the structure that carries an axial compressive load, and buckling is a lateral deformation of the column under the application of load.